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2024年藜麥生產技術指導意見
2024-05-14
08:50:49
來源:農業農村部小宗糧豆專家指導組 全國農業技術推廣服務中心 閱讀量:14154
評論
【農機網 科技創新】 近年來我國藜麥栽培面積擴大,總產量提升,為進一步加強藜麥生產指導,農業農村部小宗糧豆專家指導組會同全國農業技術推廣服務中心,提出了以“優選良種、適期播種、適時收獲”為重點的2024年藜麥生產技術指導意見。
一、北部春播區
(一)優選良種。由于藜麥品種的區域適應性較窄,加之當前我國藜麥品種審定工作相對滯后,良種選擇應依據以下原則:一是充分利用通過審定、登記、評價并符合市場需求的品種;二是適合當地氣候、土壤條件,能夠充分利用溫光條件,保證安全成熟和高產的地方性品種。通常肥水條件好、生產水平高的地區,應選用抗倒、增產潛力大的高產品種;在旱薄地區,應選用耐旱、耐瘠薄能力強、穩產性好的品種;在機械化水平較高地區,應選擇株型緊湊、抗倒、耐密植的品種;飼用型品種應選擇生物產量高、抗逆性強、皂苷含量低的品種。
(二)選地整地。藜麥不宜重茬,建議輪作倒茬,可與馬鈴薯、燕麥、大麥、蠶豆、苜蓿、向日葵、油菜等作物輪作。藜麥出苗對水分依賴較大,鼓勵播前灌溉,無灌溉條件的地區需根據墑情或遇雨搶墑播種。按照“齊、平、松、碎、凈、墑”六字整地原則,于秋季或土壤融凍交替的春季翻耕20—40厘米為宜。藜麥不耐除草劑,若前茬作物施用了除草劑,需加大翻耕深度。結合整地,施足底肥,建議有條件的可在翻地前每畝施腐熟農家肥2—3噸或者腐熟牛羊糞800—1000公斤,尿素10—20公斤,磷酸二銨10—20公斤,硫酸鉀3—5公斤或畝施復合肥10—20公斤。也可根據測土配方精準施肥。
(三)適期播種。依據栽培方式、區域氣候、機械化水平等要素,在日平均氣溫穩定在5℃以上,擇期播種(一般為4月上旬至6月中旬),花期和成熟期盡量避開雨季。播種方式可采用條播、覆膜穴播或裸地穴播以及育苗移栽等方式進行。一般播種行距為30—60厘米、株距10—20厘米為宜,播種深度為1—3厘米,做到“下種均勻,鎮壓緊實”,避免浮籽。在確保種子活力較高的前提下,條播每畝播種量一般為0.15—0.4公斤,穴播每穴4—6粒為宜。幼苗出土后,及時查苗補苗。糧用藜麥每畝定苗一般為4000—12000株(依據品種、株型和土壤水肥條件調整),飼用藜麥適當增加密度,一般每畝定苗12000—18000株。
(四)加強田管。
1.中耕除草。藜麥目前沒有專用除草劑,主要以人工或機械除草為主。中耕培土2—3次為宜,中耕深度以松土而不損傷根系為原則,苗期5—6葉(或株高20厘米)時第1次除草松土,初花期(或株高40厘米)時第2次中耕除草,第3次中耕除草根據藜麥生長和雜草情況靈活實行。覆膜栽培應按照上述時期清理穴孔中的雜草。
2.水肥管理。為確保藜麥高產,可在初花期進行葉面追肥,建議每畝50克硼肥+100克磷酸二氫鉀兌水噴施,防止“花而不實”,葉面施肥宜淡不宜濃。全生育期澆水次數及每次澆水量依據土壤墑情和雨水多少而確定,現蕾期與開花期對土壤水分反應敏感,后期灌水要盡量避開大風天氣,減少因灌水引起的倒伏。
3.病蟲害防治。應堅持“農業防治、物理防治為主,化學防治為輔”的原則,重點防治霜霉病、葉斑病、根(莖)腐病、跳甲、蝽象、草地螟、斑蝥、蚜蟲、蠐螬、螻蛄、地老虎、根蛆、筒喙象等藜麥常見的病蟲害。選擇抗病品種,播種前可進行種子消毒處理,土傳病害或地下害蟲頻發的地區可進行種子包衣。
(五)適時收獲。當植株葉片變黃變紅,葉片大多脫落,莖稈開始變干,種子進入蠟熟期時,及時收獲。可人工收割或采用
聯合收割機收獲,為保證藜麥品質,收獲前必須將病穗、雜株去掉,收割后及時拉運攤曬,防霉爛、防變質。
二、西部春播區
(一)選擇良種。可選擇豆類(蠶豆、豌豆)、馬鈴薯、大麥、玉米、小麥、油菜等為前茬作物,避免連作。由于該產區海拔較高、溫差較大,選擇適宜當地氣候生態條件的優良品種,避免未經試驗試種的跨區引種。具體可參照北部春播區。
(二)適期播種。在無霜期≥100天的區域,適播期為3月下旬至5月下旬,一般不能晚于6月中旬,宜地溫穩定在10℃以上時播種;也可根據當地情況進行復播,適播期為6月下旬至7月中旬,宜選擇早熟品種。采用地膜覆蓋播種的種植區域可適當提前播種。
(三)田間管理。確保播前土壤墑情利于種子發芽,播種后適當鎮壓,幼苗出土后,要及時查苗補苗,若缺苗要及時補種,補種以催芽播種為宜,補苗后及時澆水(或雨后補播)。對于海拔較高地區,可采用地膜覆蓋的方式種植,選用黑色地膜為宜。
其他栽培與管理措施參考北部春播區。
三、南部春/秋播區
(一)優選良種。因地制宜科學選種,選擇抗倒伏、中早熟和抗穗發芽的紅藜、黑藜、白藜等經濟效益較高的類型,該地區資源環境等差異較大,避免未經試驗試種的跨區引種。具體可參照北部春播區。
(二)適期播種。依據本地氣候特點適期播種,建議生育期避開高溫季節,將開花期、成熟期與當地雨季錯開。云南地區播種期建議:根據藜麥品種生育期和海拔確定播種期,海拔2500米以上區域,一般5月底、6月初播種;海拔1800—2300米區域,一般7月中下旬、8月初播種;海拔1500米以下,光熱條件好,有灌溉條件的地方可延遲至10月播種,建議適當增加播種量。四川地區播種期建議:干熱河谷區等季節性降雨頻發地區,春播區域可在2月中下旬至3月上旬播種,秋播區域可在8月中下旬至9月上旬播種,宜靈活選擇不同熟期品種,使成熟期避開雨季。其他地區可根據海拔高度和作物布局合理安排播期,海拔高于2800米區域,可在3—4月雪融后播種,宜選擇中、早熟品種;海拔1500—2800米區域,一般3月下旬至5月中旬播種,成熟期安排在10月下霜之前;海拔1500米以下區域,一般3月中旬至4月上旬播種為宜。
(三)適時收獲。當植株葉片變黃變紅,葉片大多脫落,莖稈開始變干,種子進入蠟熟期時即可進行收獲。收獲時間宜選擇清晨進行,減少籽粒脫落損失。
其他栽培與管理措施參考北部春播區。
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